package com.csx.framework.netty.udp.server;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioDatagramChannel;

/**
 * <p> what does this class do ? </p>
 * <p> How does it work ?</p>
 * <p> Why does it do this ?</p>
 *
 * @author cuisongxu
 * @date 2023/8/9 周三 17:21
 */
public class NettyServer {

    public static void main(String[] args) {

        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(group)
                    .channel(NioDatagramChannel.class)
                    .option(ChannelOption.SO_BROADCAST, true)
                    .option(ChannelOption.SO_RCVBUF, 2048 * 1024) // 设置UDP读缓冲区为2M
                    .option(ChannelOption.SO_SNDBUF, 1024 * 1024) // 设置UDP写缓冲区为1M
                    .handler(new MyChannelInitializer());

            ChannelFuture future = bootstrap.bind(7397).sync();
            future.channel().closeFuture().sync();

        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            // 优雅的关闭，释放内存
            group.shutdownGracefully();
        }
    }
}
